Solenoid – Definition and Pronunciation
What is Solenoid?
Solenoids are electrically operated device for opening and closing valves and performing other mechanical functions without the use of an electric motor.
Examples of Solenoid
When the ship ESD system is healthy, an IS solenoid driver in the ship assembly is energised, making power available on the «ship» side of the jetty assembly via the ship/shore cable.
From “Linked ESD Systems at Both LNG and LPG Terminals”.

From “Complete Guide to Below Deck Sailboat Systems: Ventilation, Marine Heads, Water Systems and more”.
This is situated in the electrical equipment room and the sampling sequence is automatically controlled by solenoid selection valves, with the sampled gas drawn into the panel by pumps before being passed over an infrared gas analyser.
From “Common LNG Support Systems”.
The solenoid-operated valve on the Freon outlet line opens as soon as the R.22 compressor is started and, unless the manual liquid outlet valve is shut, the initial gush of liquid will fill the condenser before it has had time to evaporate and some liquid may be carried over to the compressor suction.
From “Transportation of the Petroleum Gas and Amonia Cargoes on the Fully-Refrigerated LPG Ships”.